Symmes can refer to: People John Cleves Symmes, colonel in the Continental Army and New Jersey representative at the Continental Congress John Cleves Symmes, Jr., originator of the Hollow Earth theory Zechariah Symmes, Puritan minister in colonial Charlestown, Massachusetts Places Symmes Creek in southeastern Ohio Symmes Mission Chapel in Fairfield, Ohio Symmes Purchase in southwestern Ohio Symmes Township, Edgar County, Illinois Symmes Township, Hamilton County, Ohio Symmes Township, Lawrence County, Ohio Symmes Valley High School in Willow Wood, Ohio